QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2md

Puerto Rico region

Yes. A magnitude 3.2 earthquake was recorded in the Puerto Rico region, at 12:07 am AST on 27 July 2022 (04:07 UTC), 24 km deep.

· 24 km deep · released about 1 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Isabela Municipio 79 kmQuebradillas Municipio 81 kmAguadilla Municipio 82 kmCamuy Municipio 83 kmHatillo Municipio 85 kmArecibo Municipio 89 kmBarceloneta Municipio 90 kmMoca Municipio 92 kmAguada Municipio 95 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 3.2 (md)
Depth
24 km below the surface
Felt
no reports yet
Nearest
Isabela Municipio, 79 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1570 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 42 km (26 mi) from the epicentre. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

How big was it?

This earthquake released about 1 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 170,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 7,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 5,200× the energy of this one
  4. This earthquake M 3.2 about 1 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.1× more

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

For this area

The largest earthquake within 50 km in our catalogue was M 6.0 on 2019-09-24 — about 15,000 times the energy of this one.

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 19.1927, -66.9328. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Isabela Municipio, PR 79 km (49 mi) S earthquakes near Isabela Municipio
Quebradillas Municipio, PR 81 km (50 mi) S earthquakes near Quebradillas Municipio
Aguadilla Municipio, PR 82 km (51 mi) SSW earthquakes near Aguadilla Municipio
Camuy Municipio, PR 83 km (52 mi) S earthquakes near Camuy Municipio
Hatillo Municipio, PR 85 km (53 mi) S earthquakes near Hatillo Municipio
Arecibo Municipio, PR 89 km (55 mi) SSE earthquakes near Arecibo Municipio

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

36 earthquakes have been recorded within 50 km since this one.

  1. 3.1 76 km N of Tierras Nuevas Poniente, Puerto Rico
  2. 3.3 51 km N of Hatillo, Puerto Rico
  3. 3.4 112 km N of San Antonio, Puerto Rico
  4. 3.2 49 km NNW of San Antonio, Puerto Rico
  5. 3.3 37 km N of San Antonio, Puerto Rico
  6. 3.6 91 km N of San Antonio, Puerto Rico
  7. 3.4 73 km N of Tierras Nuevas Poniente, Puerto Rico
  8. 3.4 76 km N of Arecibo, Puerto Rico
  9. 3.2 73 km N of Arecibo, Puerto Rico
  10. 3.8 72 km N of Arecibo, Puerto Rico
  11. 3.2 73 km N of Arecibo, Puerto Rico
  12. 3.3 72 km N of Arecibo, Puerto Rico
  13. 2.9 42 km NNW of San Antonio, Puerto Rico
  14. 2.8 37 km NNW of San Antonio, Puerto Rico
  15. 3.0 62 km N of Isabela, Puerto Rico

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.